Zilog Z380

Derivatives

• Hitachi developed the HD64180, a microcoded and partially dynamic Z80 in CMOS, with on-chip peripherals and a simple MMU, giving a 1 MB address space. It was later second sourced by Zilog, initially as the Z64180, and then in the form of the slightly modified Zilog Z180 which has bus protocol and timings better adapted to Z80 peripheral chips. Z180 has been maintained and further developed under Zilog's name, the newest versions being based on the fully static S180/L180 core with low power draw and EMI (noise).
• Toshiba developed the 84-pin Z84013 / Z84C13 and the 100 pin Z84015 / Z84C15 series of "intelligent peripheral controllers", basically ordinary NMOS and CMOS Z80 cores with Z80 peripherals, watchdog timer, power on reset, and wait state generator on the same chip. Manufactured by Sharp as well as Toshiba. These products are today second sourced by Zilog.
• The 32-bit Z80 compatible Zilog Z380, introduced 1994, is used in telecom equipment.
• Zilog's fully pipelined Z80 compatible eZ80 with an 8/16/24-bit word length and a linear 16 MB address space was introduced in 2001. It exists in versions with on-chip SRAM or Flash memory, as well as with integrated peripherals. One variant has an on-chip medium access controller (MAC), and available software include a TCP/IP stack. In contrast with the Z800 and Z280, there are only a few added instructions (primarily load Effective Address (LEA), Push Effective Address (PEA), and variable-address 16/24-bit loads), but instructions are instead executed between 2 and 11 times as clock cycle efficiently as on the original Z80, with a mean value around 3-5 times. It is currently specified for clock frequencies up to 50 MHz.
• Kawasaki developed the binary compatible KL5C8400 which is approximately 1.2-1.3 times as clock cycle efficient as the original Z80 and can be clocked at up to 33 MHz. Kawasaki also produces the KL5C80A1x family, which has peripherals as well as a small RAM on chip; it is approximately as clock cycle efficient as the eZ80 and can be clocked at up to 10 MHz (2006).
• The NEC μPD9002 was a hybrid CPU compatible with both Z80 and x86 families.
• The Chinese Actions Semiconductor's audio processor family of chips (ATJ2085 and others) contains a Z80-compatible MCUs together with a 24-bit dedicated DSP processor. These chips are used in a number of MP3 and media player products.
• The T80 (VHDL) and TV80 (Verilog) synthesizable soft cores are available from OpenCores.org.
• The National Semiconductor NSC800 announced in 1980 is used in multiple TeleSecurity Timmann (TST) electronic cipher machines and the Canon X-07. The NSC800 is fully compatible with the Z80 instruction set. The NSC800 uses a multiplexed bus like the 8085 but has a different pinout than the Z80.